File:Cutterhead of dredge Bill Holman Louisville Kentucky USA Ohio River mile 607 July 2002 file a2g092.jpg
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Summary[edit]
DescriptionCutterhead of dredge Bill Holman Louisville Kentucky USA Ohio River mile 607 July 2002 file a2g092.jpg |
English: Cutterhead of dredge Bill Holman working below McAlpine Locks
Louisville, Kentucky, USA Ohio River mile 607 |
Date | |
Source | Own work |
Author | William Alden III |
Camera location | 38° 16′ 44.24″ N, 85° 48′ 00.6″ W | View this and other nearby images on: OpenStreetMap | 38.278956; -85.800167 |
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Dredging below McAlpine Locks,showing cutterhead of dredge Bill Holman
The navigation channel below McAlpine Locks accumulates sediment during high water periods and so must be dredged every year
The cutter-suction dredge (or dredger) Bill Holman (built in 1978 by Ellicott Dredges, LLC) is owned by Luhr Bros., which is contracted by the U.S. Army Corps of Engineers to perform the work
As the cutterhead rotates, its teeth churn up the riverbed sediment, which is then sucked up and piped to a deposit area
In this photo, the cutterhead has been raised out of the water so a crewman aboard the workboat Buddy can remove debris caught in the teeth
At lower left is one of the guy wires which are used to swing the cutterhead back and forth
At upper right is the downstream end of Sand Island
file # a2g092
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current | 12:42, 13 December 2018 | 1,600 × 1,200 (1.07 MB) | William Alden (talk | contribs) | User created page with UploadWizard |
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Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Camera manufacturer | Canon |
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Camera model | Canon PowerShot A40 |
Author | William Alden III |
Copyright holder | William Alden III |
Exposure time | 1/400 sec (0.0025) |
F-number | f/4.8 |
Date and time of data generation | 11:24, 24 July 2002 |
Lens focal length | 16.1875 mm |
Software used | Picture Window Pro 64 v6.0.10 |
File change date and time | 11:24, 24 July 2002 |
Exif version | 2.2 |
Date and time of digitizing | 11:24, 24 July 2002 |
APEX shutter speed | 8.65625 |
APEX aperture | 4.5260620117188 |
APEX exposure bias | 0 |
Maximum land aperture | 2.9708557128906 APEX (f/2.8) |
Metering mode | Pattern |
Flash | Flash did not fire, auto mode |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 7,766.9902912621 |
Focal plane Y resolution | 0.00081232593534859 |
Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1.3548990048127 |
Scene capture type | Standard |